Permanent magnet contactor with breaking protection device

Abstract

The invention relates to a permanent magnetic contactor with a breaking protection device. A machine housing is further provided with a compulsive tripping device. The compulsive tripping device comprises a compulsive breaking spring capable of realizing deformation energy storage. The compulsive breaking spring is provided with a deformation driving release end. The deformation driving release end is connected with a compulsive breaking jump cap capable of driving the disconnection between a moving contact and a static contact, which are in a switching-on state, in the energy releasing process of the compulsive breaking spring. The compulsive breaking jump cap is correspondingly matched with a latching mechanism used for latching or releasing the compulsive breaking spring. The latching mechanism is provided with a latching end which is capable of being matched with the compulsive breaking jump cap to realize that the compulsive breaking spring is latched in an energy storage state, and a trigger end which is used for driving the latching end and the compulsive breaking jump cap to release the compulsive breaking spring. The trigger end of the latching mechanism is connected with a trigger device. The permanent magnetic contactor has the advantages that compulsive breaking under a fault state is achieved, the fault protection function is realized; the safety performance is good; under a power failure condition, breaking by hands is simple and convenient; and the installation, the debugging and the test are convenient.

Description

technical field [0001] The invention relates to a contactor, in particular to a permanent magnet contactor, especially a contactor with a breaking protection device. Background technique [0002] exist Electrical Engineering On, because it can quickly cut off the main circuit of AC and DC and can frequently switch on the device with high current control (some models can reach 800 amps), so often It is used as a control object for electric motors, and can also be used to control electric loads such as factory equipment, electric heaters, working machines and various electric power units. The contactor can not only connect and cut off the circuit, but also has the function of low voltage release protection. According to the operating mechanism, contactors are divided into electromagnetic contactors and permanent magnet contactors. [0003] The permanent magnet contactor includes a contactor body and a control circuit. The contactor body includes a casing, a permanent magnet...

AI Technical Summary

Problems solved by technology

However, there are certain defects in the permanent magnetic contactor: on the one hand, when the controllable device (MOS tube, etc.) The loss of control ability of the power supply circuit brings major safety hazards to the safety of industrial production and even the entire distribution network

On the other hand, in the case of power failure, the permanent magnets remain tightly closed, and it is difficult to separate the permanent magnet contactors manually, and the contacts must be turned on to separate the contacts. extremely inconvenient

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